ATMEGA8_08 Datasheet, PDF (268/308 Pages) ATMEL Corporation – 8-bit with 8K Bytes In-System Programmable Flash

Pin Thresholds and
Hysteresis
Figure 155. I/O Pin Input Threshold Voltage vs. V_CC (V_IH, I/O Pin Read as “1”)
2.5
2
1.5
1
0.5
0
2.5
I/O PIN INPUT THRESHOLD VOLTAGE vs. V_CC
VIH, IO PIN READ AS '1'
3
3.5
4
4.5
5
V_CC (V)
-40°C
85°C
25°C
5.5
Figure 156. I/O Pin Input Threshold Voltage vs. V_CC (V_IL, I/O Pin Read as “0”)
2
1.5
1
0.5
0
2.5
I/O PIN INPUT THRESHOLD VOLTAGE vs. V_CC
VIL, IO PIN READ AS '0'
3
3.5
4
4.5
5
V_CC (V)
-40°C
25°C
85°C
5.5
268 ATmega8(L)
2486T–AVR–05/08